I lost my capability to send email with N97 Mini. I do have two accounts and they use same smtp server (smtpa.kolumbus.fi) with my primary user account (from kolumbus). One is sending email nicely, but another one is giving quite frustrating error when I try to send email. Strange.
This triggered my "one time" usage experiments with Nokia's email system, one which is integrated to N97 Mini and promises to bring my emails immediately to phone. It was not so nice looking application, but what I found really problematic was the fact that all my emails are going through that Nokia server. This privacy invading solution is very problematic for me. I barely trust my operator, but generating some extra services between me and my operator imap server is total nonsense.
So, if possible - stick to native email application without that extra feature, if it works for you. Mine is not working anymore. So, I placed sim once again to another phone from N97 mini. And turned my all IM and emailing to trustworthy Linux laptop (actually I run three of these at the moment) and I am happy with GPG secured emailing.
Follow the leader Nokia.